Power distribution over ethernet connection

ABSTRACT

In an embodiment, a power delivery system includes a first current limiter and a second current limiter in parallel with each other, wherein a direct current (DC) voltage is provided to each of the first current limiter and the second current limiter; a first transformer electrically coupled to the first current limiter; a second transformer electrically coupled to the second current limiter; first differential signal traces electrically coupled to the first transformer; and second differential signal traces electrically coupled to the second transformer, wherein the DC voltage is transmitted from the first transformer to the first differential signal traces simultaneous with the DC voltage being transmitted to the second differential signal traces by the second transformer.

CROSS-REFERENCE TO RELATED APPLICATIONS

This application is a continuation of U.S. patent application Ser. No.17/332,960, filed on May 27, 2021, entitled “POWER DISTRIBUTION OVERETHERNET CONNECTION”, which claims priority to U.S. Provisional PatentApplication No. 63/032,192, filed on May 29, 2020, entitled “POWERDISTRIBUTION OVER ETHERNET CONNECTION”, the contents of which are herebyincorporated by reference in their entirety and for all purposes.

BACKGROUND

Electronic devices including networking devices and/ornetworking-related devices can communicate with each other using twistedpairs of insulated wire, such as Ethernet cables. Ethernet cables arecapable of transmitting power as well as data between devices. Cablesfor electronics devices supplying power or data are frequently subjectto certain building codes and/or regulatory requirements. For instance,low voltage cables with individual circuits carrying more than 100 Watt(W) are subjected to more stringent building codes and/or regulatoryrequirements than low voltage circuits carrying less than 100 W.

Many building codes require additional restrictions and protections onlow voltage circuits carrying more than 100 W of power in order toreduce the risk of fire if a cable is inadvertently shorted to ground.To safely power an electronic device requiring more than 100 W via anEthernet cable, multiple independent low voltage circuits can be usedthat each draw less than 100 W. Among other things, these additionalcircuits require more electrical components, more expensive electricalcomponents, and/or more complex design than for a single 100 W lowvoltage circuit.

BRIEF DESCRIPTION OF THE DRAWINGS

The foregoing aspects and many of the attendant advantages of theembodiments of the present disclosure will become more readilyappreciated as the same become better understood by reference to thefollowing detailed description, when taken in conjunction with theaccompanying drawings, wherein:

FIG. 1 is an example block diagram illustration of a communication nodeand associated component(s) included in a communication system inaccordance with various aspects of the present disclosure.

FIG. 2 illustrates at least a portion of a circuit showing details ofmagnetics included in the power delivery device shown in FIG. 1 inaccordance with various aspects of the present disclosure.

FIG. 3 illustrates at least a portion of a circuit showing details ofmagnetics included in the communication node shown in FIG. 1 inaccordance with various aspects of the present disclosure.

FIG. 4A is an example block diagram illustration of a communication nodeand associated component(s) included in a communication system inaccordance with various aspects of the present disclosure.

FIG. 4B is an example block diagram illustration of a communication nodeand associated component(s) included in a communication system inaccordance with various aspects of the present disclosure.

FIG. 5 illustrates at least a portion of a circuit showing details ofmagnetics included in the power delivery device shown in FIG. 4A inaccordance with various aspects of the present disclosure.

FIG. 6 illustrates at least a portion of a circuit showing details ofmagnetics included in the communication node shown in FIG. 4A inaccordance with various aspects of the present disclosure.

FIG. 7 illustrates a diagram showing an example wireless communicationsystem in accordance with various aspects of the present disclosure.

DETAILED DESCRIPTION

Embodiments of apparatuses and methods relate to power delivery over anEthernet cable to a communication node of a communication system. Theseand other aspects of the present disclosure will be more fully describedbelow.

While the concepts of the present disclosure are susceptible to variousmodifications and alternative forms, specific embodiments thereof havebeen shown by way of example in the drawings and will be describedherein in detail. It should be understood, however, that there is nointent to limit the concepts of the present disclosure to the particularforms disclosed, but on the contrary, the intention is to cover allmodifications, equivalents, and alternatives consistent with the presentdisclosure and the appended claims.

References in the specification to “one embodiment,” “an embodiment,”“an illustrative embodiment,” etc., indicate that the embodimentdescribed may include a particular feature, structure, orcharacteristic, but every embodiment may or may not necessarily includethat particular feature, structure, or characteristic. Moreover, suchphrases are not necessarily referring to the same embodiment. Further,when a particular feature, structure, or characteristic is described inconnection with an embodiment, it is submitted that it is within theknowledge of one skilled in the art to affect such feature, structure,or characteristic in connection with other embodiments whether or notexplicitly described. Additionally, it should be appreciated that itemsincluded in a list in the form of “at least one A, B, and C” can mean(A); (B); (C); (A and B); (B and C); (A and C); or (A, B, and C).Similarly, items listed in the form of “at least one of A, B, or C” canmean (A); (B); (C); (A and B); (B and C); (A and C); or (A, B, and C).

Language such as “top surface”, “bottom surface”, “vertical”,“horizontal”, and “lateral” in the present disclosure is meant toprovide orientation for the reader with reference to the drawings and isnot intended to be the required orientation of the components or toimpart orientation limitations into the claims.

In the drawings, some structural or method features may be shown inspecific arrangements and/or orderings. However, it should beappreciated that such specific arrangements and/or orderings may not berequired. Rather, in some embodiments, such features may be arranged ina different manner and/or order than shown in the illustrative figures.Additionally, the inclusion of a structural or method feature in aparticular figure is not meant to imply that such feature is required inall embodiments and, in some embodiments, it may not be included or maybe combined with other features.

Many embodiments of the technology described herein may take the form ofcomputer- or processor-executable instructions, including routinesexecuted by a programmable computer, processor, controller, chip, and/orthe like. Those skilled in the relevant art will appreciate that thetechnology can be practiced on computer/controller systems other thanthose shown and described above. The technology can be embodied in aspecial-purpose computer, controller, or processor that is specificallyprogrammed, configured or constructed to perform one or more of thecomputer-executable instructions described above. Accordingly, the terms“computer,” “controller,” “processor,” or the like as generally usedherein refer to any data processor and can include Internet appliancesand hand-held devices (including palm-top computers, wearable computers,cellular or mobile phones, multi-processor systems, processor-based orprogrammable consumer electronics, network computers, mini computers,and the like). Information handled by these computers can be presentedat any suitable display medium, including an organic light emittingdiode (OLED) display or liquid crystal display (LCD).

Some of the issues raised above with respect to powering devices areaddressed in this disclosure. It would be advantageous to configuredevices to include power circuitry, Ethernet ports, and/or otherelectrical components defining the power path in compliance with lowervoltage, low power transmission limit requirements while still capableof safely handling higher power requirements. Likewise, it would beadvantageous to power higher power-requiring electronic devices over anEthernet cable using lower power transmission compliant power circuitry.It would be advantageous for power circuitry and associated circuitrycapable of transmitting and/or receiving higher power to have otherbenefits such as protection against adverse operating conditions. Itwould also be advantageous to provide a simple yet robust method todetect that an electronic device can safely receive this total poweracross multiple circuits. Accordingly, embodiments of the presentdisclosure are directed to these and other improvements in networkingdevices, networking-related devices, power circuitry, and/or portionsthereof.

FIG. 1 is an example block diagram illustration of a communication node100 and associated component(s) included in a communication system inaccordance with various aspects of the present disclosure. Communicationnode 100 includes ground or terrestrial equipment configured tocommunicate with one or more other communication nodes included in thecommunication system. Communication node 100 is powered by a directcurrent (DC) power source 102 that is derived from an alternatingcurrent (AC) power source 110. Communication node 100 is associated witha user desirous of transmitting and receiving information using thecommunication system.

Communication node 100 is also referred to as a node, user terminal,user equipment, user transceiver, end terminal, and/or the like. In anembodiment, communication node 100 can include a gateway, repeater,relay, base station, and/or other communications equipment included inthe communication system. The communication system can include awireless communication system, a satellite-based communication system, aterrestrial-based communication system, a non-geostationary (NGO)satellite communication system, a low Earth orbit (LEO) satellitecommunication system, and/or the like.

In some embodiments, communication node 100 is located on the ground(e.g., backyard), on a building (e.g., rooftop, baloney, side of thebuilding), near the ground (e.g., deck), and/or any location suitable tomaintain a line of sight (or at least a partial line of sight) withanother communication node of the communication system. For example,without limitation, in a satellite communication system, thecommunication node 100 can include ground equipment configured tocommunicate with one or more satellites of a satellite constellationorbiting Earth.

Communication node 100 is electrically coupled to a power deliverydevice 102 via an Ethernet cable 41104. Power delivery device 102 can belocated internal to a building, structure, or enclosure 106 whilecommunication node 100 is located internal, external, or partiallyexternal to building/structure/enclosure 106. Power delivery device 102is also referred to as a power brick, power transformer, and/or thelike. If at least a portion of the communication node 100 is locatedoutdoors, a first portion of the Ethernet cable 104 can be locatedinside building/structure/enclosure 106 and a second portion of theEthernet cable 104 different from the first portion can be locatedoutside of building/structure/enclosure 106. Ethernet cable 104 issufficiently shielded and weatherproofed so as to be able to withstand avariety of weather and/or external conditions.

Power delivery device 102 is configured to draw voltage from an AC powersupply 110, convert the received voltage into a low DC voltage formatsuitable for transmitting to communication node 100, provide one or morecircuit protection features to prevent damage to communication node 100,be responsive to power needs of communication node 100, and/or the like.Power delivery device 102 includes at least three ports or externalconnection points—a first port to electrically couple to an AC powersupply 110; a second port to wired or wirelessly communicate with a userdevice 103, such as a user Ethernet port 112; and a third portcomprising an Ethernet port to electrically couple to the Ethernet cable104.

AC power supply 110 includes an AC voltage supply or source provided inthe building/structure/enclosure 106. As an example, without limitation,AC power supply 110 includes an AC voltage wall outlet. Depending on thecountry or type of wall outlet, the AC voltage can range from 100 Volt(V) to 240 V AC.

User Ethernet port 112 is associated with wired or wirelesscommunication with a user device 103. For example, the user device 103can include a laptop or computer having a wired connection with powerdelivery device 102 via an Ethernet cable electrically coupled to theuser Ethernet port 112. Power delivery device 102 serves as anintermediary or conduit for data communication between the user device103 and communication node 100. Data from the user device 103 isprovided to communication node 100 via power delivery device 102 andEthernet cable 104. Communication node 100, in turn, transmits the datato another communication node of the communication system. The returneddata from the another communication node (or a different communicationnode) is propagated in reverse order to the user device 103. As anotherexample, the user device 103 can include a wireless router (e.g., Wifirouter) and a user interfacing device such as a laptop, computer,smartphone, tablet, Internet of Things (IoT) device, etc. The wirelessrouter has a wired connection with power delivery device 102, via userEthernet port 112, while the user interfacing device wirelesslycommunicates with the wireless router. In such a scheme, data from theuser interfacing device is relayed to the wireless router, user Ethernetport 112, power delivery device 102, Ethernet cable 104, then tocommunication node 100. The returning data from another communicationnode is propagated in reverse order to the user interfacing device.

Power delivery device 102 includes, but is not limited to, the userEthernet port 112; an alternating current-direct current (AC-DC)converter 114; current limiters 116, 118, 120, 122; a power controller124; surge protectors 126, 128, 130; and magnetics 132, 134, 136, 138.AC-DC converter 114 is (electrically) disposed between AC power supply110, and each of current limiter 116, current limiter 118, currentlimiter 120, and current limiter 122. Power controller 124 electricallycouples to each of current limiter 116, current limiter 118, currentlimiter 120, and current limiter 122. In some embodiments, powercontroller 124 electrically couples to AC-DC converter 114. In someembodiments, power controller 124 can be included within AC-DC converter114. Surge protector 130 electrically couples to each of user Ethernetport 112, magnetics 132, magnetics 134, magnetics 136, and magnetics138. Surge protector 126 is electrically disposed between magnetics 132and current limiter 116. Surge protector 128 is electrically disposedbetween magnetics 134 and current limiter 118. Current limiter 120 iselectrically disposed between magnetics 136 and AC-DC converter 114.Current limiter 122 is electrically disposed between magnetics 138 andAC-DC converter 114.

Ethernet cable 104 is configured to simultaneously transport data andpower from the power delivery device 102 to the communication node 100,and can also transport data from the communication node 100 to the powerdelivery device 102. Ethernet cable 104 includes a plurality of wires orelectrical conductive lines, which in combination with communicationnode 100 and power delivery device 102, define circuits as will bedescribed in detail below. Because current flows in a loop in each ofthe defined circuits, voltage information associated with thecommunication node 100 is provided, along with data, to power deliverydevice 102 via Ethernet cable 104, which can be used for variousmonitoring, control, and/or protection purposes.

Communication node 100 includes, but is not limited to, magnetics 152,154, 156, 158; surge protectors 160, 168, modem and antenna system 162,diodes 164, 166, a power signature circuit 170; and a board powerconverter 172. Magnetics 132 and 152 are electrically coupled to eachother via twisted pair wires 182 of Ethernet cable 104. Magnetics 134and 154 are electrically coupled to each other via twisted pair wires184 of Ethernet cable 104. Magnetics 136 and 156 are electricallycoupled to each other via twisted pair wires 186 of Ethernet cable 104.Magnetics 138 and 158 are electrically coupled to each other via twistedpair wires 188 of Ethernet cable 104. Surge protector 160 iselectrically coupled to each of magnetics 152, 154, 156, 158, and modemand antenna system 162. Magnetics 152 is electrically coupled to diode164, and diode 164, in turn, is electrically coupled to surge protector168. Magnetics 154 is electrically coupled to diode 166, and diode 166,in turn, is electrically coupled to surge protector 168. Power signaturecircuit 170 electrically couples to magnetics 156 and 158. Powersignature circuit 170 also electrically couples to surge protector 168.The board power converter 172 is electrically disposed between the modemand antenna system 162 and the power signature circuit 170.

Power delivery device 102 is referred to as the source side or source,and communication node 100 is referred to as the load side or load forpower delivery purposes. Since the power is delivered or injected tocommunication node 100 from the power delivery device 102 via theEthernet cable 104, the power delivery scheme of the present disclosureis referred to as power over Ethernet (PoE).

AC-DC converter 114 is configured to draw voltage from AC power supply110. AC power supply 110 is configured to supply a voltage signal havinga voltage between approximately 100 to 240 V AC, for example. AC-DCconverter 114 is configured to draw less or equal to the maximum voltageavailable from AC power supply 110. In some embodiments, AC-DC converter114 is configured to convert the voltage received from AC power supply110 to a voltage level less or equal to the maximum voltage levelpermitted per circuit under regulatory requirements.

In some embodiments, power delivery device 102 can be a Class 2compliant device, a National Electric Code (NEC) classification in theUnited States in which each output low voltage circuit is limited to amaximum of 100 Watt (W) if used with an AC to DC power supply or 60 V DCor lower voltage per circuit. Ethernet cable 104 also can be a Class 2compliant device. Nevertheless, power delivery device 102 via Ethernetcable 104 is capable of delivering a maximum of 60 V DC per circuit perClass 2 compliant requirement and safely limits each circuit to 100 Wmaximum while still delivering a total of greater than 100 W spread outacross multiple circuits. Each circuit is current limited on the powerdelivery (via current limiters 116, 118) and power return side (viacurrent limiters 120, 122), and the system provides diodes 164, 166 incommunication node 100 to safely limit each circuit to less than 100 Weven during cable or device damage or faults.

The converted voltage outputted by AC-DC converter 114 can be 56 V DC,for example (e.g., a DC voltage less than or equal to 60 V). As usedherein, references to 56 V or 56 V DC can be understood more generallyto mean any DC supply voltage that complies with electrical coderequirements and/or system design requirements for maximum voltage percircuit. The converted voltage can be the input to each of currentlimiters 116 and 118. Each of current limiter 116 (denoted as currentlimiter 1) and current limiter 118 (denoted as current limiter 2) isconfigured to limit the current associated with the converted voltage toa pre-set value, if necessary, before providing the converted voltage torespective surge protectors 126, 128. Each of surge protectors 126, 128,also referred to as a surge suppressor, is configured to suppressvoltage spikes. If the inputted voltage level is above a thresholdlevel, then the inputted voltage portion above the threshold is blockedor shorted to ground. This ensures that the voltage inputted to each ofmagnetics 132, 134 is the same as the converted voltage outputted byAC-DC converter 114 or is limited to 60 V DC or less per Class 2requirements. Such voltage inputted to each of magnetics 132, 134includes the power or power signal to be delivered to communication node100.

In an embodiment, instead of AC-DC converter 114 providing a voltagesignal at a desired voltage, current limiters 116, 118 and/or surgeprotectors 126, 128 are configured to transform the voltage signaloutputted from AC-DC converter 114 into the desired voltage to each ofthe magnetics 132, 134. Each of current limiters 116, 118 can beconfigured to output a particular current associated with the desiredvoltage, based on control signals from power controller 124. Surgeprotectors 126, 128 can act as a final check of the desired voltagebeing provided to each of magnetics 132, 134 for transmission tocommunication node 100.

Surge protector 130 also includes a surge suppressor configured toprotect against voltage spikes. In the present disclosure, surgeprotector 130 is configured to protect against potential high voltagesassociated with the data signal received from the user device 103 viauser Ethernet port 112.

The Ethernet data signals are transmitted using twisted pair wires orlines. Power is delivered by applying a common DC bias voltage to bothwires/lines of the twisted pair. Accordingly, the power deliverytechnique described with respect to FIG. 1 can be referred to as commonmode power delivery. This allows the data transmission to ride on top ofthe DC bias voltage. Each magnetics 132, 134, 136, 138, 152, 154, 156,158 includes a transformer in series with a common mode choke. Thetransformer is configured to apply or remove the applied DC voltagewhile the common mode choke is configured to attenuate noise associatedwith the Ethernet data signals. Transformers included in magnetics 132,134, 156, and 158 apply the DC bias voltage to respective twisted pairwires. The DC bias voltage can be input into the center tap of thetransformers included in magnetics 132, 134, 156, and 158. Transformersincluded in magnetics 152, 154, 136, and 138 separate the DC biasvoltage from the data signals. In communication node 100, DC biasvoltage separated or extracted by transformers are sent to board powerconverter 172 to power the communication node 100 while the data signalsare sent to modem and antenna system 162. Data signals can be sent touser Ethernet port 112 from node 100 to communicate between devices.Each of magnetics 132, 134, 136, 138, 152, 154, 156, 158 is alsoreferred to as Ethernet magnetics. Ethernet cable 104 includes at leastfour (electrically conductive) twisted pairs of wires/lines 182, 184,186, 188 (also referred to as twisted pair wires/lines) electricallycoupled to respective magnetics 132, 134, 136, 138 at one end andrespective magnetics 152, 154, 156, 158 at the opposite end. A firstsignal path is thus defined by magnetics 132, first twisted pair wires182, and magnetics 152. A first transmission signal traverses the firstsignal path to be received by magnetics 152. A second signal path isdefined by magnetics 134, second twisted pair wires 184, and magnetics154. A second transmission signal traverses the second signal path to bereceived by magnetics 154. A third signal path is defined by magnetics156, third twisted pair wires 186, and magnetics 136. A fourth signalpath is defined by magnetics 158, fourth twisted pair wires 188, andmagnetics 138. The third and fourth signal paths include part of returnsignal paths to complete the circuits. First, second, third, and fourthsignal paths are parallel to each other.

First transmission signal received by magnetics 152 is processed toseparate the data from the power. The data, carried on a signal having acertain voltage, is provided as an input to surge protector 160. Surgeprotector 160 is similar to surge protector 130 in that surge protector160 is configured to suppress incoming voltage above a threshold. Surgeprotector 160 is configured to output the data to modem and antennasystem 162 at a safe signal level. Second transmission signal receivedby magnetics 154 is similarly processed, with its associated datainputted to surge protector 160, data voltage level limited asnecessary, and outputted to modem and antenna system 162.

Modem and antenna system 162 is configured to process the data signalsappropriate for transmission to another communication node of thecommunication system. Modem and antenna system 162 includes, but is notlimited to, one or more modem, antenna, processor, transmitter,receiver, integrated circuit (IC) chips, transmission associatedcircuitry, receiving associated circuitry, and/or the like.

The power portion of the first transmission signal at magnetics 152 canbe the input to diode 164. Diode 164 is configured to isolate externalcable or device faults or damage that can short multiple circuitstogether. This diode prevents current from flowing backwards and ensuresthat the total power on a single circuit does not exceed 100 W. Withoutdiode 164, current from a first circuit can flow backwards onto a secondcircuit if the second circuit is inadvertently shorted in Ethernet cable104. The current limiters (e.g., current limiters 116, 118, 120, and/or122) can still each detect less than 100 W but one of the twisted pairlines can have a combined power above 100 W by drawing from a firstcircuit from power delivery device 102 and a second circuit that comesfrom node 100. With inclusion of diode 164, a shorted circuit can onlydraw power from power delivery device 102 and the current limitersproperly limit the circuit even in a faulted condition. The output ofdiode 164 can be a voltage signal close to 56 V DC, a slightly lowervoltage level than nominally injected to current limiter 116 and thefirst signal path. For example, the output of the diode 164 can bewithin 0 V-1.5 V of the voltage level nominally injected to currentlimiter 116.

The power portion of the second transmission signal at magnetics 154 canbe the input to diode 166. Diode 166 is similar to diode 164. The outputof diode 166 also can be a voltage signal slightly lower than 56 V DC.For example, the output of the diode 166 can be within 5% of the voltagelevel nominally injected to current limiter 118. The voltage signals arecombined together at the outputs of diodes 164, 166, to a combinedvoltage signal still at slightly below 56 V (taking into account cablepower losses and diode power losses) or approximately equal to (nominal)56 V. Communication node 100 can now draw power from two circuitssimultaneously to use more than 100 W in total while the individualcircuits in the Ethernet cable 104 are safely limited to less than 100W.

The combined voltage signal can be input to surge protector 168 tosuppress any voltage in excess of a pre-set threshold value. Surgeprotector 168 is configured to clamp voltage surges at a level justbelow the safe operating limit of the downstream components (e.g., powersignature circuit 170 and/or board power converter 172) to protect themagainst transients or faults. The voltage signal outputted by surgeprotector 168 is the input to power signature circuit 170.

Power signature circuit 170 is configured to signal to power deliverydevice 102 that it is safe to apply the DC supply voltage to node 100.The DC supply voltage can be any voltage that complies with relevantSome Ethernet devices cannot handle 56 V applied to the twisted pairs.In some embodiments, power controller 124 included in power deliverydevice 102 first applies a first voltage through a high resistance. Thefirst voltage can be 3 V, 5 V, 5.5 V or any voltage that can be safelyapplied to Ethernet devices that cannot handle a high DC voltage appliedto the twisted pairs. In response, power signature circuit 170 appliesthat equivalent high resistance to ground to signal to power controller124 that it acknowledges the request to send power and that node 100 iscapable of receiving the full 56 V. The high resistance is chosen sothat if the Ethernet cable 104 is (electrically) shorted, it will draw aminimal current from current limiters 116 and 118 and not pose any harm.If node 100 is a device not capable of receiving higher power, the highresistance also protects the device from damage since the voltage andcurrent levels are so low that it cannot damage the device if itinadvertently draws current.

Power controller 124 then looks to see if the first voltage (e.g., 5 V)output after the high resistance is dropped in half (e.g., to about 2.5V) or some other pre-set portion (e.g., one third, two thirds, etc.) ofthe first voltage applied through the high resistance by powercontroller 124. This signals to power controller 124 that the other side(e.g., node 100) applied the proper high resistance value and that theEthernet cable 104 is not shorted. If the full first voltage is stilldetected, then power controller 124 knows that there is no deviceelectrically connected at the other end of Ethernet cable 104 and not tosend power. If the voltage is less than the pre-set portion of the firstvoltage, power controller 124 knows that there is a wiring short or thatnode 100 is not capable of receiving power. If, however, the pre-setportion of the first voltage is detected within some tolerance, powercontroller 124 can safely supply 56 V by enabling current limiters 116and 118. In this manner, a detection technique for safely providingpower to a load device is implemented using a simple circuit without acontroller (e.g., power signature circuit 170) in node 100. The need fora complicated controller in the load device and/or numerouscommunication between load and source devices is obviated.

The combined approximately 56 V is provided to board power converter 172to properly allocate and distribute power to various components includedin node 100. For example, modem and antenna system 162 is powered bypower received from board power converter 172. Each subcomponent ofmodem and antenna system 162 can have different power requirements fromeach other and the power requirement for a given subcomponent can varyas a function of time (e.g., a subcomponent is enabled or disabled atdifferent points in time).

A circuit forms a closed loop and accordingly, the start of the returnsignal path is defined by the board power converter 172 to powersignature circuit 170, and then toward magnetics 156 and 158. The returnor output voltage signal splits into each of magnetics 156, 158 to bereceived by magnetics 136, 138, respectively, via third and fourthlines, 186, 188, respectively. Magnetics 136, 138, in turn, providereturn voltages to respective current limiters 120, 122. The outputs ofcurrent limiters 120, 122 are combined to be an input to AC-DC converter114.

The circuits formed by communication node 100, Ethernet cable 104, andpower delivery device 102 have single and dual signal paths at differentportions. At a first portion 190 of the circuits, starting with theAC-DC converter 114, a single signal path is defined (e.g., a singlevoltage signal at 56 V DC outputted by AC-DC converter 114 to each ofcurrent limiters 116, 118). At a second portion 192 of the circuits,starting with current limiters 116, 118, dual or parallel signal pathsare defined. The two signal paths continue with magnetics 132, 134 andto magnetics 152, 154, respectively. At a third portion 194 of thecircuits, starting with the surge protector 168 to power signaturecircuit 170 to board power converter 172 and then back to powersignature circuit 170, a single signal path is defined. At a fourthportion 196 of the circuits, starting with magnetics 156, 158 to currentlimiters 120, 122, dual or parallel signal paths are defined. At a fifthportion 198 of the circuits, the outputs of current limiters 120, 122are combined into a single signal path to AC-DC converter 114.

In some embodiments, a first circuit is defined from the output ofcurrent limiter 116 to diode 164 and the associated return path to powerdelivery device 102, which is a current path of a single circuit of lessthan 100 W. A second circuit is defined from the output of currentlimiter 118 to diode 166 and the associated return path to powerdelivery device 102, which is a current path of another single circuitof less than 100 W. Thus, two circuits, each carrying less than 100 W,supplies a total of more than 100 W to communication node 100.

Because total power to communication node 100 is delivered on two signalpaths/lines/circuits (via first and second twisted pair wires 182, 184of Ethernet cable 104) from power delivery device 102, more than 100 Wcan be safely delivered to the load (communication node 100) whilestaying in compliance with the maximum allowed power and DC voltagelevels per delivery signal path/line/circuit. This means that thecircuitry in communication node 100, power delivery device 102, orEthernet cable 104 is not subject to higher regulatory requirements,such as regulatory requirements associated with power delivery greaterthan 100 W via a single power delivery path/line/circuit between sourceand load.

In some embodiments, prior to start of full power delivery as describedabove, a check is performed by load detection circuitry as to whether anappropriate communication node, such as communication node 100, ispresent and properly connected to power delivery device 102. Loaddetection circuitry can be included in AC-DC converter 114 or comprise aseparate component electrically disposed between AC-DC converter 114 andcurrent limiters 116, 118. Load detection circuitry can also be referredto as handshaking circuitry.

Load detection circuitry is configured to apply a small resistance tothe circuit (e.g., add a 1 kiloOhm (kΩ) resistance) just prior to startof second portion 192. A particular (small) voltage (e.g., 3.3V, 5 V,5.5 V or any other suitable small voltage) is outputted by AC-DCconverter 114 as the detection input voltage. The value of the detectionreturn or output voltage, in response to the detection input voltage, ismeasured or detected. If the detection return or output voltage is aparticular value (e.g., approximately 2.5 V DC), such voltage value isindicative of the communication node 100 present and properly connectedto the power delivery device 102. The values of the detection inputvoltage and the detection output voltage are selected relative to eachother given the particular applied resistance. Such handshake procedureis facilitated by power signature circuit 170 and power controller 124as described above.

Upon detection of the communication node 100, the applied resistance isdisabled or removed from the circuit for full or normal power deliveryusing 56 V DC output by AC-DC converter 114.

In some embodiments, AC-DC converter 114 may output 56 V DC (or someother voltage) and power controller 124 is configured to generatecommand signals regarding operation of current limiters 116, 118. Inresponse, current limiters 116, 118 limit the output currents to aparticular value, the particular value selected with the expectation ofthe detection return voltage being approximately 2.5 V DC ifcommunication node 100 is properly connected.

If the detection return voltage is zero, then the load side is shortedout and it is deemed unsafe to apply the 56 V. The applied resistancelimits the current so that the circuit can safely stay in the shortedstate indefinitely, if necessary. If the detection return voltage is aparticular value higher than the value indicative of proper connectionwith communication node 100 (typically higher than the approximately 2.5V DC such as 5 V DC), then the device at the other end can be anincompatible device and the 56 V is not applied. If the detection returnvoltage is nominally 2.5V DC, the 2.5 V DC detected is associated withan appropriate resistor included in the load side and a safe conditionto apply 56 V.

Power controller 124 is configured to control current limiters 116, 118,120, 122. Current limiters 116, 118, 120, 122 can communicate with powercontroller 124, such as providing detected current values to powercontroller 124 to protect against faults. As an example, if powercontroller 124 determines power greater than 100 W per circuit, based ondetected current in one or more of current limiters 116, 118, 120, 122,power controller 124 is configured to send control signals to currentlimiters 116 and 118 (or current limiters 120 and 122). The controlsignals configure current limiters 116 and 118 (or current limiters 120and 122) to be disabled or turned off so as to shut off power from beingdelivered by the circuit. The power shut off protects against faults andso that the power delivery device 102 will still be Class 2 compliant.

If the voltage drops too low, power shut off can also occur, since thiscondition is indicative of the Ethernet cable 104 dissipating too muchpower. The power may be shut off to protect the Ethernet cable 104 fromdamage or further damage.

Although the example block diagram of FIG. 1 describes a DC supplyvoltage (e.g., 56V) generated by an AC-DC converter with an AC powersupply 110 as an input, it should be understood that the DC supplyvoltage can also be generated by a DC-DC converter (not shown) includedwithin the power delivery device 102 with a DC power supply (e.g., as analternative to AC power supply 110) as an input without departing fromthe scope of the present disclosure. In some implementations, the powerdelivery device 102 may not include a AC-DC converter or DC-DCconverter, and the DC supply voltage can be provided to the powerdelivery device 102 from an external DC power supply.

FIG. 402 illustrates at least a portion of a circuit showing details ofmagnetics 132, 134, 136, 138 in accordance with various aspects of thepresent disclosure. Each of magnetics 132, 134, 136, 138 includes highcurrent magnetics. Magnetics 132 includes a transformer 200 electricallycoupled to a common mode choke 202. The DC voltage (e.g., 56 V) from thesurge protector 116 is input into the center tap of transformer 200.Common mode choke 202 electrically couples to a capacitor 204, and thenterminates to ground. Transformer 200 includes a transformer havingprimary windings to secondary windings at a 1:1 ratio. Transformer 200can include any of the following types of transformer, withoutlimitation, wire coiled on ferrite cores, copper traces wrapped with aferrite core, and/or the like.

Common mode choke 202 is configured to filter out or attenuate noisefrom the data signals. Common mode choke 202 is located on the physical(PHY) side or the side of the transformer 200 furthest from the lineside (e.g., first twisted pair wires 182). Common mode choke 202 islocated between the data side (from user Ethernet port 112) andtransformer 200, rather than between transformer 200 and the line side(first twisted pair wires 182). Thus, magnetics 132 is also referred toas reverse magnetics or reverse configured magnetics.

Transformer 200 includes a transformer having primary windings tosecondary windings at a 1:1 ratio. Transformer 200 can include any ofthe following types of transformer, without limitation, wire coiled onferrite cores, copper traces wrapped with a ferrite core, and/or thelike.

Each of the remaining magnetics 134, 136, 138 and associated componentsis similar to magnetics 132 and associated components discussed above,except associated with respective second, third, and fourth twisted pairwires 184, 186, 188. Unlike for magnetics 152, 154, there are no bridgediodes (such as diodes 164, 166) associated with magnetics 132, 134. Theconfiguration of magnetics 132, 134, 136, 138 provides lightningprotection.

Capacitors C1 (204), C2, C3, and/or C4 can be optional depending on thebias of the respective pair line, in some embodiments.

FIG. 3 illustrates at least a portion of a circuit showing details ofmagnetics 152, 154, 156, 158 in accordance with various aspects of thepresent disclosure. Each of magnetics 152, 154, 156, 158 includes highcurrent magnetics. Magnetics 152 includes a transformer 300 electricallycoupled to a common mode choke 302. Common mode choke 302 is configuredto filter out or attenuate noise of the data signal. Common mode choke302 is located on the PHY side or the side of the transformer 300furthest from the line side (e.g., first twisted pair wires 182). Commonmode choke 302 is located between the data side (to modem and antennasystem 162) and transformer 300, rather than between transformer 300 andthe line side (first twisted pair wires 182). Thus, magnetics 152 isalso referred to as reverse magnetics or reverse configured magnetics.

A DC voltage (e.g., 56 V) can be output from the center tap oftransformer 300. Transformer 300 can be a transformer having primarywindings to secondary windings at a 1:1 ratio. Transformer 300 caninclude any of the following types of transformer, without limitation,wire coiled on ferrite cores, copper traces wrapped with a ferrite core,and/or the like.

Each of the remaining magnetics 154, 156, 158 and associated componentsis similar to magnetic 152 and associated components discussed above,except associated with respective second, third, and fourth twisted pairwires 184, 186, 188. Magnetics 132, 134, 136, 138 and associatedcomponents are also similar to respective magnetics 152, 154, 156, 158.Magnetics 132, 134, 136, 138 and associated components are mirrored orsymmetrical about an imaginary plane into the page in FIG. 1 withrespect to magnetics 152, 154, 156, 158. Capacitors C5 (304), C6, C7,and/or C8 can be optional depending on the bias of the respective pairline, in some embodiments.

In this manner, more than 100 W can be safely delivered to a load froman AC to DC power source. While conventional power over Ethernet islimited to 100 W due to regulatory requirements (e.g., Class 2 compliantpower delivery). For delivering more than 100 W, different cablingrequirement and/or circuit requirements are applicable. In the presentdisclosure, a total of more than 100 W is delivered by splitting thepower into two individually current limited and protected circuits orlines from the source to the load (e.g., at least a portion of thecircuit includes dual or parallel signal paths/lines). Suchimplementation permits the source to use lower power circuit (portions)that comply with the regulatory limit of 60 V DC and 100 W per circuit.

FIG. 4A is an example block diagram illustration of a communication node400A and associated component(s) included in a communication system inaccordance with various aspects of the present disclosure. Communicationnode 400A is similar to and performs similar functionality tocommunication node 100 shown in FIG. 1 . Components with likeidentifiers in FIG. 1 and FIG. 4A correspond and perform similarfunctionality. FIG. 4A illustrates an additional configuration fordelivering DC power to the communication node 400A as will be describedin more detail below.

Communication node 400A includes ground or terrestrial equipmentconfigured to communicate with one or more other communication nodesincluded in the communication system. Communication node 400A is poweredby a direct current (DC) power source that is derived from analternating current (AC) power source. Communication node 400A isassociated with a user desirous of transmitting and receivinginformation using the communication system.

Communication node 400A is also referred to as a node, user terminal,user equipment, user transceiver, end terminal, and/or the like. In anembodiment, communication node 400A can include a gateway, repeater,relay, base station, and/or other communications equipment included inthe communication system. The communication system can include awireless communication system, a satellite-based communication system, aterrestrial-based communication system, a non-geostationary (NGO)satellite communication system, a low Earth orbit (LEO) satellitecommunication system, and/or the like.

In some embodiments, communication node 400A is located on the ground(e.g., backyard), on a building (e.g., rooftop, baloney, side of thebuilding), near the ground (e.g., deck), and/or any location suitable tomaintain a line of sight (or at least a partial line of sight) withanother communication node of the communication system. For example,without limitation, in a satellite communication system, thecommunication node 400A can include ground equipment configured tocommunicate with one or more satellites of a satellite constellationorbiting Earth.

Communication node 400A is electrically coupled to a power deliverydevice 402A via an Ethernet cable 404. Power delivery device 402A can belocated internal to a building, structure, or enclosure 406 whilecommunication node 400A is located internal, external, or partiallyexternal to building/structure/enclosure 406. Power delivery device 402Ais also referred to as a power brick, power transformer, and/or thelike. If at least a portion of the communication node 400A is locatedoutdoors, a first portion of the Ethernet cable 404 can be locatedinside building/structure/enclosure 406 and a second portion of theEthernet cable 404 different from the first portion can be locatedoutside of building/structure/enclosure 406. Ethernet cable 404 issufficiently shielded and weatherproofed so as to be able to withstand avariety of weather and/or external conditions.

Power delivery device 402A is configured to draw voltage from an ACpower supply 110, convert the received voltage into a low DC voltageformat suitable for transmitting to communication node 400A, provide oneor more circuit protection features to prevent damage to communicationnode 400A, be responsive to power needs of communication node 100,and/or the like. Power delivery device 102 includes at least three portsor external connection points—a first port to electrically couple to anAC power supply 110; a second port to wired or wirelessly communicatewith a user device 103, such as a user Ethernet port 112; and a thirdport comprising an Ethernet port to electrically couple to the Ethernetcable 104.

AC power supply 110 includes an AC voltage supply or source provided inthe building/structure/enclosure 406. As an example, without limitation,AC power supply 110 includes an AC voltage wall outlet. Depending on thecountry or type of wall outlet, the AC voltage can range from 100 Volt(V) to 240 V AC.

User Ethernet port 112 is associated with wired or wirelesscommunication with a user device 103. For example, the user device 103can include a laptop or computer having a wired connection with powerdelivery device 402A via an Ethernet cable electrically coupled to theuser Ethernet port 112. Power delivery device 402A serves as anintermediary or conduit for data communication between the user device103 and communication node 400A. Data from the user device 103 isprovided to communication node 400A via power delivery device 402A andEthernet cable 404. Communication node 400A, in turn, transmits the datato another communication node of the communication system. The returneddata from the another communication node (or a different communicationnode) is propagated in reverse order to the user device 103. As anotherexample, the user device 103 can include a wireless router (e.g., Wifirouter) and a user interfacing device such as a laptop, computer,smartphone, tablet, Internet of Things (IoT) device, etc. The wirelessrouter has a wired connection with power delivery device 402A, via userEthernet port 112, while the user interfacing device wirelesslycommunicates with the wireless router. In such a scheme, data from theuser interfacing device is relayed to the wireless router, user Ethernetport 112, power delivery device 402A, Ethernet cable 404, then tocommunication node 400A. The returning data from another communicationnode is propagated in reverse order to the user interfacing device.

Power delivery device 402A includes, but is not limited to, the userEthernet port 112; an alternating current-direct current (AC-DC)converter 114; current limiters 116, 118, 120, 122; a power controller124; surge protectors 126, 128, 130; magnetics 432, 434, 436, 438,inductors 401, 403, 405, 407, and DC isolation capacitors 417, 419, 421,423. AC-DC converter 114 is (electrically) disposed between AC powersupply 110, and each of current limiter 116, current limiter 118,current limiter 120, and current limiter 122. Power controller 124electrically couples to each of current limiter 116, current limiter118, current limiter 120, and current limiter 122. In some embodiments,power controller 124 electrically couples to AC-DC converter 114. Insome embodiments, power controller 124 can be included within AC-DCconverter 114. Surge protector 130 electrically couples to each of userEthernet port 112, magnetics 432, magnetics 434, magnetics 436, andmagnetics 438. Surge protector 126 is electrically disposed betweeninductor 401 and current limiter 116. Inductor 401 is electricallycoupled to a first wire of twisted pair wires 482 of Ethernet cable 404.DC isolation capacitor 417 is electrical disposed between the first wireof twisted pair wires 482 and magnetics 432. Surge protector 128 iselectrically disposed between inductor 403 and current limiter 118.Inductor 403 is electrically coupled to a first wire of twisted pairwires 484 of Ethernet cable 404. DC isolation capacitor 419 iselectrical disposed between the first wire of twisted pair wires 484 andmagnetics 434. Current limiter 120 is electrically disposed betweeninductor 405 and AC-DC converter 114. Inductor 405 is electricallycoupled to a second wire of twisted pair wires 482 of Ethernet cable404. DC isolation capacitor 421 is electrical disposed between thesecond wire of twisted pair wires 482 and magnetics 432. Current limiter122 is electrically disposed between inductor 407 and AC-DC converter114. Inductor 407 is electrically coupled to a second wire of twistedpair wires 484 of Ethernet cable 404. DC isolation capacitor 423 iselectrical disposed between the second wire of twisted pair wires 484and magnetics 434.

Ethernet cable 404 is configured to simultaneously transport data andpower from the power delivery device 402A to the communication node400A, and can also transport data from the communication node 400A tothe power delivery device 402A. Ethernet cable 404 includes a pluralityof wires or electrical conductive lines, which in combination withcommunication node 400A and power delivery device 402A, define circuitsas will be described in detail below. Because current flows in a loop ineach of the defined circuits, voltage information associated with thecommunication node 400A is provided, along with data, to power deliverydevice 402A via Ethernet cable 404, which can be used for variousmonitoring, control, and/or protection purposes.

Communication node 400A includes, but is not limited to, magnetics 452,454, 456, 458; surge protectors 160, 168; modem and antenna system 162;diodes 464, 466, inductors 409, 411, 413, 415, DC isolation capacitors425, 427, 429, 431, a power signature circuit 170, and a board powerconverter 172. DC isolation capacitors 425 and 427 are electricaldisposed between Magnetics 452 and first and second wires, respectively,of twisted pair wires 482 of Ethernet cable 404. DC isolation capacitors429 and 431 are electrical disposed between magnetics 454 and first andsecond wires, respectively, of twisted pair wires 484 of Ethernet cable404. Magnetics 436 and 456 are electrically AC coupled to each other viatwisted pair wires 486 of Ethernet cable 404. Magnetics 438 and 458 areelectrically AC coupled to each other via twisted pair wires 488 ofEthernet cable 404. Surge protector 160 is electrically coupled to eachof magnetics 452, 454, 456, 458, and modem and antenna system 162.Inductor 409 is electrically coupled between diode 464 and the firstwire of twisted pair wires 482, and diode 464, in turn, is electricallycoupled to surge protector 168. Inductor 411 is electrically coupledbetween diode 466 and the first wire of twisted pair wires 484, anddiode 466, in turn, is electrically coupled to surge protector 168.Inductor 413 is electrically coupled to the second wire of twisted pairwires 482. Inductor 415 is electrically coupled to the second wire oftwisted pair wires 484. Power signature circuit 170 electrically couplesto inductors 413 and 415. Power signature circuit 170 also electricallycouples to surge protector 168. The board power converter 172 iselectrically disposed between the modem and antenna system 162 and thepower signature circuit 170.

AC-DC converter 114 is configured to draw voltage from AC power supply110. AC power supply 110 is configured to supply a voltage signal havinga voltage between approximately 100 to 240 V AC, for example. AC-DCconverter 114 is configured to draw less or equal to the maximum voltageavailable from AC power supply 110. In some embodiments, AC-DC converter114 is configured to convert the voltage received from AC power supply110 to a voltage level less or equal to the maximum voltage levelpermitted per circuit under regulatory requirements.

In some embodiments, power delivery device 402A can be a Class 2compliant device, a NEC classification in the United States in whicheach output low voltage circuit is limited to a maximum of 100 Watt (W)if used with an AC to DC power supply or 60 V DC or lower voltage percircuit. Ethernet cable 404 also can be a Class 2 compliant device.Nevertheless, power delivery device 402A via Ethernet cable 404 iscapable of delivering a maximum of 60 V DC per circuit per Class 2compliant requirement and safely limits each circuit to 100 W maximumwhile still delivering a total of greater than 100 W spread out acrossmultiple circuits. Each circuit is current limited on the power delivery(via current limiters 116, 118) and power return side (via currentlimiters 120, 122), and the system provides diodes 464, 466 incommunication node 400A to safely limit each circuit to less than 100 Weven during cable or device damage or faults.

The converted voltage outputted by AC-DC converter 114 can be 56 V DC,for example (e.g., a DC voltage less than or equal to 60 V). Theconverted voltage can be the input to each of current limiters 116 and118. Each of current limiter 116 (denoted as current limiter 1) andcurrent limiter 118 (denoted as current limiter 2) is configured tolimit the current associated with the converted voltage to a pre-setvalue, if necessary, before providing the converted voltage torespective surge protectors 126, 128. Each of surge protectors 126, 128,also referred to as a surge suppressor, is configured to suppressvoltage spikes. If the inputted voltage level is above a thresholdlevel, then the inputted voltage portion above the threshold is blockedor shorted to ground. This ensures that the voltage inputted to each ofinductors 401, 403 is the same as the converted voltage outputted byAC-DC converter 114 or is limited to 60 V DC or less per Class 2requirements. Such voltage inputted to each of inductors 401, 403comprise the power or power signal to be delivered to communication node100.

In an embodiment, instead of AC-DC converter 114 providing a voltagesignal at a desired voltage, current limiters 116, 118 and/or surgeprotectors 126, 128 are configured to transform the voltage signaloutputted from AC-DC converter 114 into the desired voltage to each ofthe inductors 401, 403. Each of current limiters 116, 118 can beconfigured to output a particular current associated with the desiredvoltage, based on control signals from power controller 124. In someembodiments, power controller 124 can be included in and/or providecontrol signals (not shown) to the AC-DC converter 114. Surge protectors126, 128 can act as a final check of the desired voltage being providedto each of inductors 401, 403 for transmission to communication node100.

Surge protector 130 also includes a surge suppressor (not shown)configured to protect against voltage spikes. In the present disclosure,surge protector 130 is configured to protect against potential highvoltages associated with the data signal received from the user device103 via user Ethernet port 112.

The Ethernet data signals are transmitted using twisted pair wires orlines. Power is delivered by applying a differential DC bias voltageacross wires/lines of the twisted pair. The data transmission rides ontop of the differential DC bias voltage applied to each wire/line of thetwisted pair. Accordingly, the power delivery technique described withrespect to FIG. 4A is referred to as differential power delivery. Theinductors 401, 403, 405, 407 apply the differential DC bias voltage torespective twisted pair wires. DC isolation capacitors 417, 419 isolatethe magnetics 432 from the applied differential DC bias voltage.Similarly, DC isolation capacitors 421, 423 isolate the magnetics 434from the applied differential DC bias voltage. Inductors 409, 411, 413,415 are used to separate the differential DC bias voltage fromrespective twisted pair wires. DC isolation capacitors 425, 427, isolatethe magnetics 452 from the applied differential DC bias voltage.Similarly, DC isolation capacitors 429, 431 isolate the magnetics 454from the applied differential DC bias voltage. In communication node400A, DC bias voltage separated or extracted by inductors 409, 411, 413,415 are sent to board power converter 172 to power the communicationnode 400A while the data signals are sent to modem and antenna system162. Data signals can be sent to user Ethernet port 112 fromcommunication node 400A to communicate between devices.

Each magnetics 432, 434, 436, 438, 452, 454, 456, 458 includes atransformer in series with a common mode choke. The transformer isconfigured to apply or remove the applied DC voltage while the commonmode choke is configured to attenuate noise associated with the Ethernetdata signals. Each of magnetics 432, 434, 436, 438, 452, 454, 456, 458is also referred to as Ethernet magnetics.

Ethernet cable 404 includes at least four (electrically conductive)twisted pairs wires/lines 482, 484, 486, 488 electrically AC coupled torespective magnetics 432, 434, 436, 438 at one end and respectivemagnetics 452, 454, 456, 458 at the opposite end. A first AC signal pathis thus defined by magnetics 432, first twisted pair wires 482, andmagnetics 452. A first transmission signal traverses the first AC signalpath to be received by magnetics 452. Simultaneously, first and secondwires of the first twisted pair 482 act as portions of a signal path andreturn path, respectively, for a first DC power circuit. A second ACsignal path is defined by magnetics 434, second twisted pair wires 484,and magnetics 454. A second transmission signal traverses the secondsignal path to be received by magnetics 454. Simultaneously, first andsecond wires of the second twisted pair 484 act as portions of a signalpath and return path, respectively, for a second DC power circuit. Athird AC signal path is defined by magnetics 456, third twisted pairwires 486, and magnetics 436. A fourth AC signal path is defined bymagnetics 458, fourth twisted pair wires 488, and magnetics 438. First,second, third, and fourth signal paths are parallel to each other. Inthe illustrated configuration, the third and fourth twisted pair wires486, 488 do not include a simultaneous DC signal path and return pathfor DC power circuits. However, it should be understood that additionalDC power circuits can be provided on the third and/or fourth twistedpair wires 486, 488 in a similar fashion to the first and second DCpower circuits described with respect to FIG. 4A.

Data contained in the first transmission signal received by magnetics452 is carried on a signal having a certain voltage and provided as aninput to surge protector 160. Surge protector 160 is similar to surgeprotector 130 in that surge protector 160 is configured to suppressincoming voltage above a threshold. Surge protector 160 is configured tooutput the data to modem and antenna system 162 at a safe signal level.Data contained in the second transmission signal received by magnetics454 is similarly processed, with its associated data inputted to surgeprotector 160, data voltage level limited as necessary, and outputted tomodem and antenna system 162.

Modem and antenna system 162 is configured to process the data signalsappropriate for transmission to another communication node of thecommunication system. Modem and antenna system 162 includes, but is notlimited to, one or more modem, antenna, processor, transmitter,receiver, integrated circuit (IC) chips, transmission associatedcircuitry, receiving associated circuitry, and/or the like.

The power portion for the first DC power circuit at inductor 409 can bethe input to diode 464. Diode 464 is configured to isolate externalcable or device faults or damage that can short multiple circuitstogether. This diode prevents current from flowing backwards and ensuresthat the total power on a single circuit does not exceed 100 W. Withoutdiode 464, current from the first DC power circuit can flow backwardsonto a second circuit if the second circuit is inadvertently shorted inEthernet cable 404. The current limiters (e.g., current limiters 116,118, 120, and/or 122) can still each detect less than 100 W but one ofthe twisted pair lines can have a combined power above 100 W by drawingfrom a first circuit from power delivery device 402A and a secondcircuit that comes from node 100. With inclusion of diode 464, a shortedcircuit can only draw power from power delivery device 402A and thecurrent limiters properly limit the circuit even in a faulted condition.The output of diode 464 can be a voltage signal close to 56 V DC, aslightly lower voltage level than nominally injected to current limiter116. For example, the output of the diode 464 can be within 5% of thevoltage level nominally injected to current limiter 116.

The power portion of the second DC power circuit at inductor 411includes the input to diode 466. Diode 466 is similar to diode 464. Theoutput of diode 466 also includes a voltage signal slightly lower than56 V DC. For example, the output of the diode 466 can be within 5% ofthe voltage level nominally injected to current limiter 118. The voltagesignals are combined together at the outputs of diodes 464, 466, to acombined voltage signal still at slightly below 56 V (taking intoaccount cable power losses and diode power losses) or approximatelyequal to (nominal) 56 V. Communication node 400A can now draw power fromtwo circuits simultaneously to use more than 100 W in total while theindividual circuits in the Ethernet cable 404 are safely limited to lessthan 100 W.

The combined voltage signal is inputted to surge protector 168 tosuppress any voltage in excess of a pre-set threshold value. Surgeprotector 168 is configured to clamp voltage surges at a level justbelow the safe operating limit of the downstream components (e.g., powersignature circuit 170 and/or board power converter 172) to protect themagainst transients or faults. The voltage signal outputted by surgeprotector 168 is the input to power signature circuit 170.

The combined approximately 56 V is provided to board power converter 172to properly allocate and distribute power to various components includedin node 400A. For example, modem and antenna system 162 is powered bypower received from board power converter 172. Each subcomponent ofmodem and antenna system 162 can have different power requirements fromeach other and the power requirement for a given subcomponent can varyas a function of time (e.g., a subcomponent is enabled or disabled atdifferent points in time).

Power signature circuit 170 and power controller 124 can apply thedetection technique for determining if it is safe to apply 56 V asdescribed above with respect to FIG. 1 above.

A circuit forms a closed loop and accordingly, the start of the returnsignal path is defined by the board power converter 172 to powersignature circuit 170, and then toward inductors 411, 413. The return oroutput voltage signal splits into each of inductors 411, 413 to bereceived by inductors 405, 407, respectively, via second lines oftwisted pair wires 482, 484, respectively. Inductors 405, 407, in turn,provide return voltages to respective current limiters 120, 122. Theoutputs of current limiters 120, 122 are combined to be an input toAC-DC converter 114.

The circuits formed by communication node 400A, Ethernet cable 404, andpower delivery device 402A have single and dual signal paths atdifferent portions. At a first portion 490 of the circuits, startingwith the AC-DC converter 114, a single signal path is defined (e.g., asingle voltage signal at 56 V DC outputted by AC-DC converter 114 toeach of current limiters 116, 118). At a second portion 492 of thecircuits, starting with current limiters 116, 118, dual or parallelsignal paths are defined. The two signal paths continue with inductors401, 403 and to inductors 409, 411, respectively. At a third portion 494of the circuits, starting with the surge protector 168 to powersignature circuit 170 to board power converter 172 and then back topower signature circuit 170, a single signal path is defined. At afourth portion 496 of the circuits, starting with inductors 413, 415,through second wires of twisted pair wires 482, 482, to inductors 405,407, and to current limiters 120, 122, dual or parallel signal paths aredefined. At a fifth portion 498 of the circuits, the outputs of currentlimiters 120, 122 are combined into a single signal path to AC-DCconverter 114.

In some embodiments, a first DC power circuit is defined from the outputof current limiter 116 to diode 464 and the associated return path topower delivery device 402A, which is a current path of a single circuitof less than 100 W. A second DC power circuit is defined from the outputof current limiter 118 to diode 466 and the associated return path topower delivery device 402A, which is a current path of another singlecircuit of less than 100 W. Thus, two circuits, each carrying less than100 W, supplies a total of more than 100 W to communication node 100.

Because total power to communication node 400A is delivered on twosignal paths/lines/circuits (via first wires of twisted pair wires 482,484 of Ethernet cable 404) from power delivery device 402A, more than100 W can be safely delivered to the load (communication node 400A)while staying in compliance with the maximum allowed power and DCvoltage levels per delivery signal path/line/circuit. This means thatthe circuitry in communication node 400A, power delivery device 402A, orEthernet cable 404 is not subject to higher regulatory requirements,such as regulatory requirements associated with power delivery greaterthan 100 W via a single power delivery path/line/circuit between sourceand load.

In some embodiments, up to two additional signal paths/lines/circuitsutilizing differential power delivery can be provided over third andfourth twisted pair wires 486, 488 while remaining within the scope ofthe present disclosure. Addition of two additional can double the amountof power that can be safely delivered to the load (communication node400A) while staying in compliance with the maximum allowed power and DCvoltage levels per delivery signal path/line/circuit. It should beunderstood from the present disclosure that the addition of additionalsignal paths/lines/circuits can require inclusion of additionalinductors, current limiters, surge protectors, diodes, and/or the like.

FIG. 4B is another example block diagram illustration of a communicationnode 400B and associated component(s) included in a communication systemin accordance with various aspects of the present disclosure. Inparticular, FIG. 4B illustrates an additional wiring configuration forsupplying a DC supply voltage to the communication node 400B. Within thepower delivery device 402B, the inductors 403, 405 and their associatedconnections to surge protector 128, current limiter 120, and wires ofthe first and second twisted pair wires 482, 484 included in powerdelivery device 402A of FIG. 4A have been removed. Similarly, within thecommunication node 400B, inductors 411, 413 and their associatedconnections to diode 466, and power signature circuit 494 included inthe communication node 400A of FIG. 4A have been removed.

Power delivery device 402B includes inductors 471 and 473. Surgeprotector 128 is electrically disposed between inductor 473 and currentlimiter 118. Inductor 473 is electrically coupled to the second wire oftwisted pair wires 482 of Ethernet cable 404. Current limiter 120 iselectrically disposed between inductor 471 and AC-DC converter 114.Inductor 471 is electrically coupled to a second wire of twisted pairwires 482 of Ethernet cable 404.

Communication node 400B includes inductors 475 and 477. Inductor 475 iselectrically coupled to the second wire of twisted pair wires 482, anddiode 466, in turn, is electrically coupled to surge protector 168.Inductor 477 is electrically coupled to the first wire of twisted pairwires 484. Power signature circuit 170 electrically couples to inductors477 and 415.

In the configuration of FIG. 4B, the first wire of twisted pair 482 andthe first wire of the second twisted pair 484 can act as portions of asignal path and return path, respectively for a first DC power circuit.Similarly, the second wire of twisted pair 482 and the second wire ofthe twisted pair 484 can act as portions of a signal path and returnpath, respectively, for a second DC power circuit.

As should be understood from FIGS. 4A and 4B, for twisted pair wires482, 484, 486, and 488 that are DC isolated relative to one another byisolation capacitors, different combinations of pairs of wires fromamong the DC isolated twisted pair wires 482, 484, 486, 488 can be usedto form a signal path and a return path of a DC power circuit withoutdeparting from the scope of the present disclosure.

In some embodiments, prior to start of full power delivery as describedabove, a check is performed by load detection circuitry as to whether anappropriate communication node, such as communication node 400, ispresent and properly connected to power delivery device 402. The checkdescribe above with respect to FIG. 1 above can be equally applied tothe differential DC power delivery described with respect to FIG. 4A andFIG. 4B.

In some embodiments, the differential power delivery described withrespect to FIG. 4A and FIG. 4B and common mode power delivery describedwith respect to FIG. 1 can be used simultaneously. For example, a commonmode power delivery circuit as described with respect to FIG. 1 can beformed with a power delivery path (or signal path) on first twisted pairwires 182/482 and a return path on second twisted pair wires 184/484. Inthe same example, two differential mode power delivery circuits asdescribed with respect to FIG. 4A and/or FIG. 4B can be formed on thirdtwisted pair wires 186/486 and fourth twisted pair wires 188/488. Theresulting configuration can be referred to as hybrid power delivery. Theexample configuration can result in a total of three signalpaths/lines/circuits capable of delivering power from the power deliverydevice 102/402 to the communication node 100/400. A hybrid configurationis not limited to utilizing first and second twisted pair wires 182/482,184/484 for the common mode DC power circuit and third and fourthtwisted pair wires 186/486, 188/488 for the differential mode DC powercircuits. For example, a common mode DC power circuit could be formed onsecond and third twisted pair wires 184/484, 186/486 with differentialmode DC power circuits formed on the remaining first and fourth pairs182/482, 188/488, or any other combination of pairs. In addition, notall available twisted pair wires need to be utilized for power deliveryover multiple circuits, as illustrated in FIG. 4A and FIG. 4B where thethird and fourth twisted pair wires 486, 488 do not include any DC powerdelivery circuitry. It should be understood from the present disclosurethat the addition of additional signal paths/lines/circuits can requireinclusion of additional inductors, current limiters, surge protectors,diodes, and/or the like.

Although the example block diagrams of FIG. 4A and FIG. 4B describe a DCsupply voltage (e.g., 56V) generated by an AC-DC converter with an ACpower supply 110 as an input, it should be understood that the DC supplyvoltage can also be generated by a DC-DC converter (not shown) includedwithin the power delivery device 102 with a DC power supply (e.g., as analternative to AC power supply 110) as an input without departing fromthe scope of the present disclosure. In some implementations, the powerdelivery device 102 may not include a AC-DC converter or DC-DCconverter, and the DC supply voltage can be provided to the powerdelivery device 102 from an external DC power supply.

FIG. 5 illustrates at least a portion of a circuit showing details ofmagnetics 432, 434, 436, 438 in accordance with various aspects of thepresent disclosure. The portion of the circuit shown of FIG. 5 isillustrated with the inductor configuration of inductors 401, 403, 405,407 associated with power delivery device 402A of FIG. 4A. It should beunderstood that the configuration of magnetics 432, 434, 436, 438described below can be used with alternative configurations of inductorssuch as the inductors 401, 407, 471, 473 shown in FIG. 4B, or the like,without departing from the scope of the present disclosure. Each ofmagnetics 432, 434, 436, 438 includes high current magnetics. Magnetics432 includes a transformer 500 electrically coupled to a common modechoke 502. The center tap of the transformer 500 electrically couples tocapacitor 433, and then terminates to ground. Common mode choke 502electrically couples to a capacitor 504, and then terminates to ground.

Common mode choke 502 is configured to filter out or attenuate noisefrom the data signals. Common mode choke 502 is located on the physical(PHY) side or the side of the transformer 200 furthest from the lineside (e.g., first twisted pair wires 482). Common mode choke 502 islocated between the data side (from user Ethernet port 112) andtransformer 500, rather than between transformer 500 and the line side(first twisted pair wires 482). Thus, magnetics 432 is also referred toas reverse magnetics or reverse configured magnetics.

Transformer 500 includes a transformer having primary windings tosecondary windings at a 1:1 ratio. Transformer 200 can include any ofthe following types of transformer, without limitation, wire coiled onferrite cores, copper traces wrapped with a ferrite core, and/or thelike.

Each of the remaining magnetics 434, 436, 438 and associated componentsis similar to magnetic 432 and associated components discussed above,except associated with respective second, third, and fourth twisted pairwires 484, 486, 488. Unlike for magnetics 452, 454, there are no bridgediodes (such as diodes 464, 466) associated with magnetics 432, 434. Theconfiguration of magnetics 432, 434, 436, 438 provides lightningprotection.

Isolation capacitors 417, 419 isolate magnetics 432 from thedifferential DC voltage carried on first twisted pair wires 482.Similarly, isolation capacitors 421, 423 isolate magnetics 434 from thedifferential DC voltage carried on second twisted pair wires 484.Magnetics 436 and 438 are similarly isolated from DC voltages byisolation capacitors. The isolation capacitors (not labeled) coupled tomagnetics 436 and 438 can prevent a DC current flowing through the thirdtwisted pair wires 486 and the fourth twisted pair wires 488 of theEthernet cable 404 due to a difference in DC voltage between ends of theEthernet cable. For example, the isolation capacitors coupled tomagnetics 436 and 438 can prevent a DC current flow when the Ethernetcable 404 is connected between buildings where building grounds are atdifferent voltages. Because there is no DC current path from the twistedpair wires 482, 484, 486, 488, the magnetics 432, 434, 436, 438 canoptionally be operated in a standard configuration (e.g., with thecommon mode choke 502 located between the transformer and the line side)without incurring power loss from DC current flowing through the commonmode chokes (e.g., choke 502 of magnetics 432) as discussed above withrespect to FIGS. 2 and 3 . In some cases, Ethernet magnetics that arenot rated for high currents and/or have a relatively large DC resistancecan be used with the differential DC power delivery technique because noDC current flows through the magnetics.

Capacitors C1 (504), C2, C3, and/or C4 can be optional depending on thebias of the respective pair line, in some embodiments.

FIG. 6 illustrates at least a portion of a circuit showing details ofmagnetics 452, 454, 456, 458 in accordance with various aspects of thepresent disclosure. The portion of the circuit shown of FIG. 6 isillustrated with the inductor configuration of inductors 409, 411, 413,415 associated with power delivery device 402A of FIG. 4A. It should beunderstood that the configuration of magnetics 452, 454, 456, 458described below can be used with alternative configurations of inductorssuch as the inductors 409, 415, 475, 477 shown in FIG. 4B, or the like,without departing from the scope of the present disclosure. Each ofmagnetics 452, 454, 456, 458 can be high current magnetics. Magnetics452 includes a transformer 600 electrically coupled to a common modechoke 602. Common mode choke 602 is configured to filter out orattenuate noise of the data signal. Common mode choke 602 is located onthe PHY side or the side of the transformer 600 furthest from the lineside (e.g., first twisted pair wires 482). Common mode choke 602 islocated between the data side (to modem and antenna system 162) andtransformer 600, rather than between transformer 600 and the line side(first twisted pair wires 482). Thus, magnetics 452 is also referred toas reverse magnetics or reverse configured magnetics.

Transformer 600 can be a transformer having primary windings tosecondary windings at a 1:1 ratio. Transformer 600 can include any ofthe following types of transformer, without limitation, wire coiled onferrite cores, copper traces wrapped with a ferrite core, and/or thelike.

Each of the remaining magnetics 454, 456, 458 and associated componentsis similar to magnetics 452 and associated components discussed above,except associated with respective second, third, and fourth twisted pairwires 484, 486, 488. Magnetics 432, 434, 436, 438 and associatedcomponents are also similar to respective magnetics 452, 454, 456, 458.Magnetics 432, 434, 436, 438 and associated components are mirrored orsymmetrical about an imaginary plane into the page in FIG. 4 withrespect to magnetics 452, 454, 456, 458. Capacitors C5 (604), C6, C7,and/or C8 can be optional depending on the bias of the respective pairline, in some embodiments.

Isolation capacitors 425, 427 isolate magnetics 452 from thedifferential DC voltage carried on first twisted pair wires 482.Similarly, isolation capacitors 429, 431 isolate magnetics 454 from thedifferential DC voltage carried on second twisted pair wires 484.Magnetics 456 and 458 are similarly isolated from DC voltages byisolation capacitors. The isolation capacitors coupled to magnetics 456and 458 (not labeled) can prevent a DC current flowing through the thirdtwisted pair wires 486 and the fourth twisted pair wires 488 of theEthernet cable 404 due to a difference in DC voltage between ends of theEthernet cable. For example, the isolation capacitors coupled tomagnetics 456 and 458 can prevent a DC current flow when the Ethernetcable 404 is connected between buildings where building grounds are atdifferent voltages. Because there is no DC current path from the twistedpair wires 482, 484, 486, 488, the magnetics 452, 454, 456, 458 canoptionally be operated in a standard configuration (e.g., with thecommon mode choke 602 located between the transformer and the line side)without incurring power loss from DC current flowing through the commonmode chokes (e.g., choke 602 of magnetics 452) as discussed above withrespect to FIGS. 2 and 3 . In some cases, Ethernet magnetics that arenot rated for high currents and/or have a relatively large DC resistancecan be used with the differential DC power delivery technique because noDC current flows through the magnetics.

The power over Ethernet schemes disclosed herein implement intelligentpower delivery that ensures safe power delivery and proactive power shutoff protocols for a variety of different operating conditions. One ormore voltage loss optimizations are implemented. The number of diodes inthe circuit is reduced to reduce voltage loss. In some embodiments, theEthernet cable 104/404 can have a shorter length (e.g., maximum lengthof approximately 30-33 meter (m)) rather than upwards of 100 m. Aconventional Ethernet cable may not be able to handle the total amountof power delivered by the power delivery device 102/402. The reversemagnetics configuration of the present disclosure facilitates less lossin power delivery since the DC power does not flow through the commonmode chokes included in the reverse magnetics.

Surge protection is also included, without limitation, on the Ethernetlines and on the power lines. This facilitates operation outdoors andnear potential lightning strikes. Conventional power over Ethernet isincapable of surviving an indirect or nearby lightning strike, or theload and/or source surviving the harsh environment of the outdoors.

FIG. 7 illustrates a diagram showing an example wireless communicationsystem 700 in accordance with various aspects of the present disclosure.System 700 includes a satellite-based communication system including aplurality of satellites orbiting Earth in, for example, anon-geostationary orbit (NGO) constellation. It is understood thatsystem 700 can also comprise any of a variety of wireless or wiredcommunication systems such as, but not limited to, a low earth orbiting(LEO) communication system, a non-earth based communication system, aground-based communication system, a space-based communication system,and/or the like.

Of the plurality of satellites comprising the satellite constellation,at least three satellites of the plurality of satellites (e.g.,satellites 702, 704, and 706) are shown in FIG. 7 for illustrativepurposes. System 700 further includes ground or Earth based equipmentconfigured to communicate with the plurality of satellites, suchequipment including a plurality of user equipment and a plurality ofgateways. User equipment 710, 712, 714, and 716 of the plurality of userequipment are shown in FIG. 7 .

Communication node 100 can include any of user equipment 710, 712, 714,or 716. Gateways 720, 722 of the plurality of gateways are also shown inFIG. 7 . Each of the satellites, user equipment, and gateways withinsystem 700 is also referred to as a node, system node, communicationnode, and/or the like.

Each user equipment of the plurality of user equipment is associatedwith a particular user. User equipment is configured to serve as aconduit between the particular user's device(s) and a satellite of theplurality of satellites which is in communication range of the userequipment, such that the particular user's device(s) can have access toa network 724 such as the Internet. Each user equipment is particularlypositioned in proximity to the associated user's device(s). For example,user equipment 710, 712, and 716 are located on the respective users'building roof and user equipment 714 is located on a yard of the user'sbuilding. A variety of other locations are also contemplated for theuser equipment. User equipment may also be referred to as userterminals, end use terminals, end terminals, user ground equipment,and/or the like.

At any given time, a communication link established between a particularsatellite and a particular user equipment facilitates access to thenetwork 724 by the user associated with the particular user equipment.One or more user devices (e.g., a smartphone, a tablet, a laptop, anInternet of Things (IoT) device, and/or the like) is in wirelesscommunication with user equipment 710 via WiFi. If, for example, theuser requests a web page via a user device, the user device relays therequest to user equipment 710. User equipment 710 can establish acommunication link 730 to the satellite 702 and transmit the request.Satellite 702, in response, establishes a communication link 732 with anaccessible gateway 720 to relay the request. The gateway 720 has wiredconnections to the network 724. The data associated with rendering therequested web page is returned in the reverse path, from the gateway720, communication link 732, satellite 702, communication link 730, userequipment 710, and to the originating user device. The requested webpage is then rendered on the originating user device.

If satellite 702 moves out of position relative to user equipment 710before the requested data can be provided to user equipment 710 (orotherwise becomes unavailable), then gateway 720 establishes acommunication pathway 734, 736 with a different satellite, such assatellite 704, to provide the requested data.

In some embodiments, one or more gateway of the plurality of gatewaysincludes repeaters (not shown) that lack a wired connection to thenetwork 724. A repeater is configured to relay communications to and/orfrom a satellite that is a different satellite from the one thatdirectly communicated with a user equipment or gateway. A repeater isconfigured to be part of the communication pathway between a userequipment and gateway. A repeater may be accessed in cases where asatellite does not have access to a gateway, and thus has to send itscommunication to another satellite that has access to a gateway via therepeater. Repeaters can be located terrestrially, on water (e.g., onships or buoys), in airspace below satellite altitudes (e.g., on anairplane or balloon), and/or other Earth-based locations. Accordingly,the plurality of gateways may also be referred to as Earth-based networknodes, Earth-based communication nodes, and/or the like.

In some embodiments, one or more transmitter system and one or morereceiver system are included in each user equipment, satellite, andgateway (and repeater) of system 700. If a node includes more than onetransmitter system, the respective transmitter systems may be the sameor different from each other. More than one receiver system included ina node may similarly be the same or different from each other.

Examples of the devices, systems, and/or methods of various embodimentsare provided below. An embodiment of the devices, systems, and/ormethods can include any one or more, and any combination of, theexamples described below.

Example 1 is an apparatus for power delivery over an Ethernetconnection, the apparatus including a source device comprising a firstcurrent limiter and a second current limiter in parallel with each otherand a first transformer and a second transformer, wherein: a directcurrent (DC) voltage is provided to each of the first and second currentlimiters; the first transformer is electrically coupled to an output ofthe first current limiter; and the second transformer is electricallycoupled to an output of the second current limiter; a load devicecomprising a third transformer and a fourth transformer in parallel witheach other; and an Ethernet cable electrically coupled between thesource device and the load device, the Ethernet cable comprising firsttwisted pair lines and second twisted pair lines. The DC voltage istransmitted to the third transformer from the first transformer via thefirst twisted pair lines simultaneous with the DC voltage beingtransmitted to the fourth transformer from the second transformer viathe second twisted pair lines.

Example 2 includes the subject matter of any one or more of thepreceding Examples, and further includes a first common mode choke, asecond common mode choke, a third common mode choke, and a fourth commonmode choke in series with respectively a first transformer, a secondtransformer, a third transformer, and a fourth transformer, wherein thefirst common mode choke is located on a side of the first transformercloser to a data line of the source device than the first twisted pairline, and the third common mode choke is located on a side of the thirdtransformer closer to a data line of the load device than the firsttwisted pair line.

Example 3 includes the subject matter of any one or more of thepreceding Examples, and further includes wherein the DC voltage is 56Volt (V) DC, or less than or equal to 60 V DC.

Example 4 includes the subject matter of any one or more of thepreceding Examples, and further includes wherein each of the sourcedevice, the load device, and the Ethernet cable is National ElectricCode Class 2 compliant.

Example 5 includes the subject matter of any one or more of thepreceding Examples, and further includes wherein a total power deliveredby the source device to the load device is greater than 100 Watt (W).

Example 6 includes the subject matter of any one or more of thepreceding Examples, and further includes wherein the source devicefurther includes a fifth transformer and a sixth transformer and theload device further includes a seventh transformer and an eighthtransformer, the fifth transformer and the seventh transformer includingat least a portion of a first return signal path to the voltage source,the sixth transformer and the eight transformers including at least aportion of a second return signal path to the voltage source, andwherein the first return signal path and the second return signal pathare parallel to each other.

Example 7 includes the subject matter of any one or more of thepreceding Examples, and further includes wherein a power deliverycircuit is included in the source and load devices, the power deliverycircuit including the DC voltage, the first current limiter and thesecond current limiter, and the first, the second, the third, and thefourth transformer. Sequentially, a first portion of the power deliverycircuit can include a single signal path, a second portion of the powerdelivery circuit includes dual signal paths, a third portion of thepower delivery circuit includes a single signal path, a fourth portionof the power delivery circuit includes dual signal paths, a fifthportion of the power delivery circuit includes a single signal path, andthe first portion of the power delivery circuit and the fifth portion ofthe power delivery circuit electrically couple with each other to form aclosed loop.

Example 8 includes the subject matter of any one or more of thepreceding Examples, and further includes wherein the dual signal pathsinclude a parallel signal path.

Example 9 includes the subject matter of any one or more of thepreceding Examples, and further includes wherein the source deviceincludes a first surge protector electrically coupled between the firstcurrent limiter and the first transformer, a second surge protectorelectrically coupled between the second current limiter and the secondtransformer, and a third surge protector electrically coupled between adata line and each of the first transformer and the second transformer.

Example 10 includes the subject matter of any one or more of thepreceding Examples, and further includes wherein one or more of thefirst surge protector, the second surge protector, or the third surgeprotector is configured to provide indirect lightning strike protection.

Example 11 includes the subject matter of any one or more of thepreceding Examples, and further includes wherein: the load deviceincludes a first surge protector and second surge protectors and a powerconverter, outputs of the third transformer and the fourth transformerare combined into a combined voltage, the combined voltage inputted tothe first surge protector, and an output of the first surge protector isinputted to the power converter. The power converter can be configuredto convert and distribute power to electrical components included in theload device. The second surge protector is electrically coupled betweena data line of the load device and each of the third transformer and thefourth transformer. The combined voltage includes a second DC voltageslightly less than the DC voltage or approximately equal to the DCvoltage.

Example 12 includes the subject matter of any one or more of thepreceding Examples, and further includes wherein at least one or more ofthe electrical components includes a modem, a transmitter, a receiver,an antenna, or an antenna assembly.

Example 13 includes the subject matter of any one or more of thepreceding Examples, and further includes wherein the load deviceincludes a communication node of a communication system associated witha user.

Example 14 includes the subject matter of any one or more of thepreceding Examples, and further includes wherein the load device islocated outdoors, the source device is located indoors, and the Ethernetcable is partially located indoors and outdoors.

Example 15 includes the subject matter of any one or more of thepreceding Examples, and further includes wherein the source deviceincludes a third current limiter and a fourth current limiter includedin a return signal path of a power delivery circuit of the source andload devices, and wherein one or more of the first current limiter, thesecond current limiter, the third current limiter, or the fourth currentlimiter is configured to detect a return voltage from the load device inresponse to a detection input voltage injected by the source device.

Example 16 includes the subject matter of any one or more of thepreceding Examples, and further includes wherein a particular resistanceis applied between the DC voltage and both the first current limiter andthe second current limiter prior to injection of the detection inputvoltage.

Example 17 includes the subject matter of any one or more of thepreceding Examples, and further includes wherein the return voltage at afirst value is indicative of the load device being a compatible deviceand properly connected to the source device, wherein each of the firsttransformer and the second transformer transmits the DC voltage to theload device if the first value is detected, and wherein the particularresistance is removed prior to injection of the DC voltage to the powerdelivery circuit.

Example 18 includes the subject matter of any one or more of thepreceding Examples, and further includes wherein if a return voltagefrom the load device, in response to injection of the DC voltage, is inexcess of a pre-set value, then one or more of the first currentlimiter, the second current limiter, the third current limiter, or thefourth current limiter is configured to shut off power to the loaddevice.

Example 19 includes the subject matter of any one or more of thepreceding Examples, and further includes wherein if a return voltagefrom the load device, in response to injection of the DC voltage, isbelow a pre-set value, then one or more of the first current limiter,the second current limiter, the third current limiter, or the fourthcurrent limiter is configured to shut off power to prevent damage to theEthernet cable.

Example 20 includes the subject matter of any one or more of thepreceding Examples, and further includes wherein the Ethernet cable hasa maximum length of approximately 30-33 meter (m).

Example 21 includes the subject matter of any one or more of thepreceding Examples, and further includes wherein the Ethernet cable hasa length between 0.5 m and 100 m.

Example 22 includes the subject matter of any one or more of thepreceding Examples, and further includes wherein the source devicefurther comprises an alternating current-direct current (AC-DC)converter configured to output the DC voltage based on an inputalternating current (AC) power source.

Example 23 includes the subject matter of any one or more of thepreceding Examples, and further includes wherein the source devicefurther comprises a DC-DC configured to output the DC voltage based onan input DC voltage.

Example 24 is a system including a source device comprising a firstcurrent limiter and a second current limiter in parallel with each otherand a first transformer and a second transformer, wherein: a DC voltageis provided to each of the first current limiter and the second currentlimiter; the first transformer is electrically coupled to an output ofthe first current limiter; and the second transformer is electricallycoupled to an output of the second current limiter. The system includesa load device including a third transformer and a fourth transformer inparallel with each other, wherein: the third transformer is configuredto receive the DC voltage from the first transformer; the fourthtransformer is configured to receive the DC voltage from the secondtransformer; and the DC voltage is selectively supplied to the loaddevice based on a particular value of a second voltage detected by thesource device in response to a first voltage supplied by the sourcedevice to the load device.

Example 25 includes the subject matter of any one or more of thepreceding Examples, and further includes wherein the load deviceincludes a power signature circuit, wherein the DC voltage from each ofthe third transformer and the fourth transformer is combined into acombined DC voltage that is inputted to the power signature circuit, andwherein the combined DC voltage exceeds a maximum power allowed for aregulatory device class to which the system is compliant.

Example 26 includes the subject matter of any one or more of thepreceding Examples, and further includes wherein the DC voltage is 56Volt (V) or less than or equal to 60 V, a total power associated withthe combined DC voltage is greater than 100 Watt (W), and each of thesource device and the load device is National Electric Code Class 2compliant.

Example 27 includes the subject matter of any one or more of thepreceding Examples, and further includes an Ethernet cable electricallycoupled between the source device and the load device, the Ethernetcable including first twisted pair lines and second twisted pair lines,wherein the DC voltage is transmitted to the third transformer from thefirst transformer via the first twisted pair lines simultaneous with theDC voltage transmitted to the fourth transformer from the secondtransformer via the second twisted pair lines.

Example 28 includes the subject matter of any one or more of thepreceding Examples, and further includes wherein the source deviceincludes a power controller electrically coupled to each of the firstcurrent limiter and the second current limiter and the load deviceincludes a power signature circuit configured to receive a combinationof the DC voltage from each of the third transformer and the fourthtransformer. The power controller can be configured to control the firstcurrent limiter and the second current limiter to apply the firstvoltage at a high resistance to the load device, and wherein the powersignature circuit is configured to return the second voltage to thesource device in response to the first voltage, the second voltageindicative of whether to supply the DC voltage to the load device.

Example 29 includes the subject matter of any one or more of thepreceding Examples, and further includes wherein if the second voltageand the first voltage have a same voltage value, the second voltage isindicative of an absence of the load device, an improperly connectedload device, or an incompatible load device, and the power controller isconfigured to control the first current limiter and the second currentlimiter to prevent the DC voltage from being provided to the loaddevice.

Example 30 includes the subject matter of any one or more of thepreceding Examples, and further includes wherein if the second voltageis approximately a pre-set portion of the first voltage, the secondvoltage is indicative of the power signature circuit applying aresistance having a value equal to the high resistance applied by thefirst current limiter and second current limiter and the load devicebeing a compatible device. The power controller is configured to controlthe first current limiter and the second current limiter to supply theDC voltage to the load device.

Example 31 includes the subject matter of any one or more of thepreceding Examples, and further includes wherein if the second voltageis below a pre-set portion of the first voltage, the second voltage isindicative of an electrical short, and the power controller isconfigured to control the first current limiter and the second currentlimiter to prevent the DC voltage from being provided to the loaddevice.

Example 32 includes the subject matter of any one or more of thepreceding Examples, and further includes wherein the first currentlimiter, the first transformer, and the third transformer include atleast a portion of a first circuit, and the second current limiter, thesecond transformer, and the fourth transformer include at least aportion of a second circuit different from the first circuit.

Example 33 is an apparatus for power delivery over an Ethernetconnection, the apparatus including a source device including a firstcurrent limiter and a second current limiter in parallel with each otherand a first inductor and a second inductor, wherein: a DC voltage isprovided to each of the first current limiter and the second currentlimiter; the first inductor is electrically coupled between an output ofthe first current limiter and a first wire of a plurality of twistedpair wires; and the second inductor is electrically coupled between anoutput of the second current limiter and a second wire of the pluralityof twisted pair wires; a load device including a third inductor coupledto the first wire of the plurality of twisted pair wires and a fourthinductor coupled to the second wire of the plurality of twisted pairwires; and an Ethernet cable electrically coupled between the sourcedevice and the load device, the Ethernet cable including the pluralityof twisted pair wires, wherein the DC voltage is transmitted to thethird inductor from the first inductor via the first wire of theplurality of twisted pair wires simultaneous with the DC voltage beingtransmitted to the fourth inductor from the second inductor via thesecond wire of the plurality of twisted pair wires.

Example 34 includes the subject matter of any one or more of thepreceding Examples, and further includes wherein the first wire isincluded in a first twisted pair wires of the plurality of twisted pairwires and the second wire is included in a second twisted pair wires ofthe plurality of twisted pair wires.

Example 35 includes the subject matter of any one or more of thepreceding Examples, and further includes wherein a total power deliveredby the source device to the load device is greater than 100 Watt (W).

Example 36 includes the subject matter of any one or more of thepreceding Examples, and further includes wherein the first wire and thesecond wire are included in a first twisted pair wires of the pluralityof twisted pair wires.

Example 37 includes the subject matter of any one or more of thepreceding Examples, and further includes wherein the DC voltage is 56Volt (V) DC, or less than or equal to 60 V DC.

Example 38 includes the subject matter of any one or more of thepreceding Examples, and further includes wherein the source deviceincludes a third current limiter and a fourth current limiter includedin a return signal path of a power delivery circuit of the source andload devices, and wherein one or more of the first current limiter, thesecond current limiter, the third current limiter, or the fourth currentlimiter is configured to detect a return voltage from the load device inresponse to a detection input voltage injected by the source device.

Example 39 includes the subject matter of any one or more of thepreceding Examples, and further includes wherein a particular resistanceis applied between the DC voltage and the first current limiter and thesecond current limiters prior to injection of the detection inputvoltage.

Example 40 includes the subject matter of any one or more of thepreceding Examples, and further includes wherein the return voltage at afirst value is indicative of the load device being a compatible deviceand properly connected to the source device, wherein the first inductortransmits the DC voltage to the load device if the first value isdetected, and wherein the particular resistance is removed prior toinjection of the DC voltage to the power delivery circuit.

Example 41 includes the subject matter of any one or more of thepreceding Examples, and further includes wherein if a return voltagefrom the load device, in response to dual injection of the DC voltage,is in excess of a pre-set value, then one or more of the first currentlimiter, the second current limiter, the third current limiter, or thefourth current limiter is configured to shut off power to the loaddevice.

Example 42 includes the subject matter of any one or more of thepreceding Examples, and further includes wherein if a return voltagefrom the load device, in response to injection of the DC voltage, isbelow a pre-set value, then one or more of the first current limiter,the second current limiter, the third current limiter, or the fourthcurrent limiter is configured to shut off power to prevent damage to theEthernet cable.

Example 43 includes the subject matter of any one or more of thepreceding Examples, and further includes wherein: the source devicefurther includes a third current limiter in parallel with the firstcurrent limiter and the second current limiter, and a first transformer,the DC voltage is provided to the third current limiter and thetransformer is electrically coupled to an output of the third currentlimiter; the load device further comprises a second transformer; and theEthernet cable further includes third twisted pair wires of theplurality of twisted pair wires, wherein the DC voltage is transmittedto the second transformer from the first transformer via the thirdtwisted pair wires simultaneous with the DC voltage being transmitted tothe third inductor from the first inductor via the first wire of theplurality of twisted pair wires and the DC voltage being transmitted tothe fourth inductor from the second inductor via the second wire of theplurality of twisted pair wires.

Although certain embodiments have been illustrated and described hereinfor purposes of description, a wide variety of alternate and/orequivalent embodiments or implementations calculated to achieve the samepurposes may be substituted for the embodiments shown and describedwithout departing from the scope of the present disclosure. Thisapplication is intended to cover any adaptations or variations of theembodiments discussed herein. Therefore, it is manifestly intended thatembodiments described herein be limited only by the claims.

What is claimed is:
 1. A power delivery system comprising: a firstcurrent limiter and a second current limiter in parallel with eachother, wherein a direct current (DC) voltage is provided to each of thefirst current limiter and the second current limiter; a firsttransformer electrically coupled to the first current limiter; a secondtransformer electrically coupled to the second current limiter; firstdifferential signal traces electrically coupled to the firsttransformer; and second differential signal traces electrically coupledto the second transformer, wherein the DC voltage is transmitted fromthe first transformer to the first differential signal tracessimultaneous with the DC voltage being transmitted to the seconddifferential signal traces by the second transformer.
 2. The powerdelivery system of claim 1, further comprising: a power control circuitconfigured to inject a detection input voltage to at least one or moreof the first current limiter or the second current limiter; a thirdtransformer electrically coupled to third differential signal traces anda return current path; and a voltage detection circuit configured todetect a return voltage from the return current path during injection ofthe detection input voltage by the power control circuit.
 3. The powerdelivery system of claim 2, further comprising a fourth transformerelectrically coupled to fourth differential signal traces and anadditional return current path.
 4. The power delivery system of claim 3,wherein the return current path and the additional return current pathare electrically coupled.
 5. The power delivery system of claim 2,wherein a reference resistance is applied between the power controlcircuit and the first current limiter or the second current limiterprior to injection of the detection input voltage.
 6. The power deliverysystem of claim 5, wherein the return voltage at a first value isindicative of a load device connection, wherein each of the firsttransformer and the second transformer transmits the DC voltage if thefirst value is detected, and wherein the reference resistance is removedprior to injection of the DC voltage.
 7. The power delivery system ofclaim 6, wherein if the return voltage, in response to injection of theDC voltage, is in excess of a pre-set value, then one or more of thefirst current limiter or the second current limiter is configured toshut off power.
 8. The power delivery system of claim 6, wherein if thereturn voltage, in response to injection of the DC voltage, is below apre-set value, then one or more of the first current limiter or thesecond current limiter is configured to shut off power.
 9. The powerdelivery system of claim 1, wherein the DC voltage is configured tosupply 100 watt (W) of total power to a load.
 10. The power deliverysystem of claim 1, further comprising a first surge protectorelectrically coupled between the first current limiter and the firsttransformer and a second surge protector electrically coupled betweenthe second current limiter and the second transformer.
 11. An apparatusfor power delivery over an Ethernet connection, the apparatuscomprising: a first current limiter and a second current limiter inparallel with each other and a first inductor and a second inductor,wherein: a DC voltage is provided to the first current limiter and thesecond current limiter; the first inductor is electrically coupledbetween an output of the first current limiter and a first wire of aplurality of twisted pair wires; and the second inductor is electricallycoupled between an output of the second current limiter and a secondwire of the plurality of twisted pair wires, wherein the DC voltage istransmitted via the first wire of the plurality of twisted pair wiressimultaneous with the DC voltage being transmitted via the second wireof the plurality of twisted pair wires.
 12. A power source devicecomprising: a DC voltage; a first current limiter and a second currentlimiter in parallel with each other; a first transformer electricallycoupled to first differential traces; a second transformer electricallycoupled to second differential traces; a first inductor electricallyconnected between the first current limiter and a first trace of thefirst differential traces; and a second inductor electrically connectedbetween the second current limiter and a second trace of the seconddifferential traces.
 13. The power source device of claim 12, furthercomprising an alternating current (AC) to DC converter, wherein an ACvoltage is input to the AC to DC converter and the DC voltage is outputfrom the AC to DC converter.
 14. The power source device of claim 12,wherein the DC voltage is supplied by a DC power supply external to thepower source device.
 15. The power source device of claim 12, furthercomprising: a third current limiter and a fourth current limiter inparallel with each other; a third transformer electrically coupled tothird differential traces; a fourth transformer electrically coupled tofourth differential traces; a third inductor electrically connectedbetween the third current limiter and a third trace of the thirddifferential traces; and a fourth inductor electrically connectedbetween the fourth current limiter and a fourth trace of the fourthdifferential traces.
 16. The power source device of claim 15, whereinthe first current limiter, the first transformer, and the thirdtransformer comprise at least a portion of a first circuit, and thesecond current limiter, the second transformer, and the fourthtransformer comprise at least a portion of a second circuit differentfrom the first circuit.
 17. The power source device of claim 12, furthercomprising: a power control circuit configured to inject a detectioninput voltage to at least one or more of the first current limiter orthe second current limiter; a third transformer electrically coupled tothird differential signal traces and a return current path; and avoltage detection circuit configured to detect a return voltage from thereturn current path during injection of the detection input voltage bythe power control circuit.
 18. The power source device of claim 17,further comprising a fourth transformer electrically coupled to fourthdifferential signal traces and an additional return current path. 19.The power source device of claim 18, wherein a reference resistance isapplied between the power control circuit and the first current limiteror the second current limiter prior to injection of the detection inputvoltage.
 20. The power source device of claim 19, wherein the returnvoltage at a first value is indicative of a load device connection,wherein each of the first transformer and the second transformertransmits the DC voltage if the first value is detected, and wherein thereference resistance is removed prior to injection of the DC voltage.